PRODUCTION OF OPTICAL FIBER PREFORM

摘要

PURPOSE:To provide a method for producing optical fiber preform free from detects and minimized in the eccentricity of its core by a hybrid method. CONSTITUTION:The production method comprises the steps of providing a clad material formed from the powder of quarts glass on the outer periphery of a core material to produce a porous molding; impregnating the porous molding with a resin; curing the resin; slicing or grinding the outer periphery of the porous molding to correct the eccentricity of the clad material on the basis of the core material; and defatting and transparently vitrifying the eccentricity- corrected porous molding.